# CVE-2023-52596: linux: In the Linux kernel, the following vulnerability has been resolved:  sysctl: Fix out of bounds access for empty sysct...

CVE-2023-52596 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52596, released March 6, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52596
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  sysctl: Fix out of bounds access for empty sysctl registers  When registering tables to the sysctl subsystem there is a check to see if header is a permanently empty directory (used for mounts). This check evaluates the first element of the ctl_table. This results in an out of bounds evaluation when registering empty directories.  The function register_sysctl_mount_point now passes a ctl_table of size 1 instead of size 0. It now relies solely on the type to identify a permanently empty register.  Make sure that the ctl_table has at least one element before testing for permanent emptiness.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2023-52596](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52596.md) | Mar 6, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2023-52596](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52596.md) | Mar 6, 2024 |

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